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Summary of Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2019 | Jan. 01, 2018 | Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] |  | true | true |  |  |
Change in Accounting Principle, Accounting Standards Update, Adoption Date |  | Jan. 31, 2019 | Jan. 01, 2018 |  |  |
Accounting Standards Update [Extensible List] |  | us-gaap:AccountingStandardsUpdate201602Member | us-gaap:AccountingStandardsUpdate201409Member |  |  |
Retained earnings | $ 876,402 | $ 848,623 |  |  |  |
Aggregate amount of transaction price allocated to remaining performance obligations | $ 1,000,000 |  |  |  |  |
Remaining performance obligations expected to be recognized, year | 2028 |  |  |  |  |
Restricted cash | $ 1,700 | 2,700 |  |  |  |
Proceeds from sale/maturity of short-term investments | 56,454 | 52,135 | $ 190,778 |  |  |
Research and development | 122,847 | 127,994 | $ 124,034 |  |  |
Common stock warrants issued, per warrant |  |  |  |  |  | $ 26.68
Equity method investments, additional investment | 1,500 |  |  |  |  |
Equity method investment, carrying value | 7,900 | 6,600 |  |  |  |
Operating lease right-of-use assets | 110,756 | $ 94,847 |  |  |  |
Lease liabilities | $ 118,577 |  |  |  |  |
Payment Technology and Services Company |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Equity method investment, noncontrolling interest | 15.00% | 8.00% |  |  |  |
Common stock Warrants |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Common stock warrants issued, per warrant | $ 26.68 |  |  |  |  |
Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Billed accounts receivable, payment term | 30 days |  |  |  |  |
Property and equipment, useful lives | 3 years |  |  |  |  |
Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Billed accounts receivable, payment term | 60 days |  |  |  |  |
Short-term investment contractual maturities | 2 years | 2 years |  |  |  |
Property and equipment, useful lives | 10 years |  |  |  |  |
Cloud and Related Solutions Revenue | Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Long-term arrangements service period | 3 years |  |  |  |  |
Future revenue including variable consideration, contractual terms ending, year | 2021 |  |  |  |  |
Cloud and Related Solutions Revenue | Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Long-term arrangements service period | 5 years |  |  |  |  |
Future revenue including variable consideration, contractual terms ending, year | 2028 |  |  |  |  |
Managed Services Solutions | Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Long-term arrangements service period | 3 years |  |  |  |  |
Managed Services Solutions | Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Long-term arrangements service period | 5 years |  |  |  |  |
ASC 606 |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Retained earnings |  |  |  |  | $ 7,000 |
ASU 2016-02 |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease right-of-use assets |  |  |  | $ 80,000 |  |
Lease liabilities |  |  |  | $ 80,000 |  |

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- Definition The cash inflow from sales, maturities, prepayments, calls and collections of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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